Reaction kettle for phenyl chloroformate

Abstract

A reaction kettle for phenyl chloroformate is characterized by comprising a reaction kettle body, four heating devices, a temperature measuring device, a stirrer and fans; the four heating devices are located on the left wall and the right wall of the reaction kettle respectively and are symmetrical; the outer wall of the reaction kettle is coated with a heat preservation and heat insulation coating, and the inner wall of the reaction kettle is coated with a high-temperature-resisting anticorrosive coating; the space between the outer wall and the inner wall of the reaction kettle is full of jacket steam; the fans are arranged on the upper right portion and the lower left portion of the reaction kettle. The stirrer is provided with a plurality of stirring paddles, materials can be mixed more evenly, and therefore the reaction process is accelerated. Due to the fact that the fans are installed at the different positions in the reaction kettle, the temperatures at all positions in the reaction kettle can be kept consistent as much as possible, and the situation that local temperature is too high, consequently side reactions are caused is avoided.

Description

Technical field [0001] The invention relates to a reaction kettle, in particular to a reaction kettle for phenyl chloroformate. Background technique [0002] Phenyl chloroformate is a corrosive oily liquid, insoluble in water, soluble in ethanol, ether, and easily soluble in petroleum ether. Phenyl chloroformate is an important organic synthesis intermediate, which is widely used in chemical synthesis and can be used as Polymer catalysts, plastic modifiers, fiber treatment agents, and intermediates for medicines and pesticides. [0003] At present, the main synthesis method of phenyl chloroformate is the phosgene method. The main steps are: (1) Dissolve phenol in chloroform, pass phosgene into it under cooling, and the amount of phosgene is equal to the amount of phenol (2) Control the reaction temperature at 5-10°C, add N,N-dimethylaniline dropwise with other substances under stirring conditions, then dilute with cold water, separate the oil layer, and wash with dilute hydrochlor...

AI Technical Summary

Problems solved by technology

These heating methods usually conduct heat through the wall of the reactor. On the one hand, the wall of the reactor will cause heat loss. On the other hand, because the heating device of the reactor is usually fixed at a certain position, and the length is fixed, Causes uneven heating of materials in the reactor, thus affecting product quality

Moreover, most of the reactors used for chemical reactions are enamel kettles or glass-lined kettles. The material of this kind of reactor is single, and it is easy to reduce the service life of the reactor for highly corrosive and highly toxic reactions.

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